600-800-1200-2000 grit paper, plastic primer i suggest silver in colour, then the colour paint you want, then a lacquer 2k all in aerosol form

take the plastic off sand down with 600 paper
wash them with soapy water and dry thoroughly
plastic primer 3 coasts light then get heavier as you go
leave 24 hours
grit with 800 on the rough areas
wash and dry again
paint using the colour you wish
leave 24 hours
sand with 1200 grit on rough areas only
wash and dry
then one last colour wait 30mins
then 3 coast of lacquer
wait 24 hours
grit with 2000 paper very lightly!!! then t cut or polish them up
all done and back in they go worked for me very well

Loverly, cheers lads, trying some different colour combinations, mainly orange as the car is black, got some spare wing mirror covers that are gonna get painted too, well I say painted I'm experimenting with plasti-dip!!